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LBT Q1 2007 Engineering Review. HPSC Hardpoints Study and Rework. Highlights (Q1/2007). Upper arm lightweighted with Carbon Fiber (weighs ≈ 1/3 the wt. of original) ‘Differential’ pistons installed and function properly w/o the need for springs Anti-Backlash gear installed

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Lbt q1 2007 engineering review

LBT Q1 2007 Engineering Review

HPSC

Hardpoints Study and Rework


Highlights q1 2007
Highlights (Q1/2007)

  • Upper arm lightweighted with Carbon Fiber (weighs ≈ 1/3 the wt. of original)

  • ‘Differential’ pistons installed and function properly w/o the need for springs

  • Anti-Backlash gear installed

  • Modify/removal of primary counterweight arms, removal of more weight

  • Modified Lower Flexure

LBT Q1 2007 Engineering Review


LBT Q1 2007 Engineering Review


LBT Q1 2007 Engineering Review Files\HPTest12072006-Sans--Carbon_AntiT_LowFlex\Fig8.bmp


LBT Q1 2007 Engineering Review Files\HPTest12072006-Sans--Carbon_AntiT_LowFlex\Fig8.bmp


LBT Q1 2007 Engineering Review Files\HPTest12072006-Sans--Carbon_AntiT_LowFlex\Fig8.bmp


Open issues
Open Issues Files\HPTest12072006-Sans--Carbon_AntiT_LowFlex\Fig8.bmp

  • Technical

    • Consistency in testing

    • Glass safety qualified

    • Backlash in 50:1 gearbox for stepper motor

  • Schedule

    • None

  • Financial

    • Unbudgeted

  • Resource

    • People

    • Time very limited

LBT Q1 2007 Engineering Review


Progress q1 2007
Progress (Q1/2007) Files\HPTest12072006-Sans--Carbon_AntiT_LowFlex\Fig8.bmp

  • Have eddy current sensors to replace LVDT’s for testing

  • Cost for current modifications ≈ $4,000

LBT Q1 2007 Engineering Review


Planning q2 2007
Planning (Q2/2007) Files\HPTest12072006-Sans--Carbon_AntiT_LowFlex\Fig8.bmp

  • Fabricate another ‘Differential’ Piston set with the appropriate gland widths

  • Continue stiffness testing, get better stiffness values from measurements

  • Test with eddy current sensors, instead of LVDT’s

  • Locate stiffness loss(es), and attempt to increase stiffness

  • Modify engine stand for gravitational loading/orientation stiffness testing

LBT Q1 2007 Engineering Review


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